CN114593474A - Spraying control method and device, electronic equipment and storage medium - Google Patents
Spraying control method and device, electronic equipment and storage medium Download PDFInfo
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- CN114593474A CN114593474A CN202210239277.4A CN202210239277A CN114593474A CN 114593474 A CN114593474 A CN 114593474A CN 202210239277 A CN202210239277 A CN 202210239277A CN 114593474 A CN114593474 A CN 114593474A
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- 238000005507 spraying Methods 0.000 title claims abstract description 254
- 238000000034 method Methods 0.000 title claims abstract description 83
- 239000007921 spray Substances 0.000 claims abstract description 96
- 230000008569 process Effects 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000012546 transfer Methods 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 13
- 238000004590 computer program Methods 0.000 claims description 12
- 239000003507 refrigerant Substances 0.000 claims description 6
- 239000000523 sample Substances 0.000 claims description 5
- 239000002826 coolant Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 229910004498 HfIn Inorganic materials 0.000 claims description 2
- 238000004378 air conditioning Methods 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 19
- 230000008859 change Effects 0.000 abstract description 13
- 238000007796 conventional method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 238000004891 communication Methods 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
- F24F1/16—Arrangement or mounting thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The embodiment of the application provides a spraying control method and device, electronic equipment and a storage medium, and relates to the technical field of air conditioners. The method comprises the steps of obtaining outdoor environment temperature and air conditioner operation parameters to determine that a spray starting condition is met; determining a spraying mode after meeting a spraying starting condition; spraying the heat exchanger based on the spraying mode; in the spraying process, whether the spraying mode needs to be switched is judged based on the outdoor environment temperature, the outdoor environment temperature and the air conditioner operation parameters are utilized to comprehensively consider the temperature change inside and outside the heat exchanger, and the spraying starting condition and the spraying mode are reasonably determined, so that the problem of water resource waste caused by unreasonable spraying in the conventional method is solved.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to a spraying control method and device, electronic equipment and a storage medium.
Background
When the air conditioner carries out the operation of refrigerating in high temperature weather, outer quick-witted heat exchange efficiency is lower, leads to interior machine refrigerating output not enough or air conditioner power consumption higher, adopts at present to spray or spraying system carries out cooling to outer machine for improve the heat exchange efficiency of outer machine, but current spray cooling system's spray control mode causes the waste of water resource easily.
Disclosure of Invention
An object of the embodiments of the present application is to provide a spraying control method, device, electronic device, and storage medium, which utilize outdoor ambient temperature and air conditioner operation parameters to comprehensively consider the temperature changes inside and outside a heat exchanger, and reasonably determine a spray starting condition and a spraying mode, thereby solving the problem of water resource waste caused by unreasonable spraying in the existing method.
The embodiment of the application provides a spraying control method, which comprises the following steps:
acquiring outdoor environment temperature and air conditioner operation parameters to determine that the start-up condition is met;
determining a spraying mode after meeting a spraying starting condition;
spraying the heat exchanger based on the spraying mode;
and in the spraying process, judging whether the spraying mode needs to be switched or not based on the outdoor environment temperature.
In the implementation process, the spray starting condition is judged by utilizing the outdoor environment temperature and the air conditioner operation parameters, the temperature change inside and outside the heat exchanger is comprehensively considered, the spray starting condition is reasonably determined, and whether the spray mode needs to be switched or not is judged according to the outdoor environment temperature change in the spray process, so that the waste of water resources is effectively avoided, and the problem of water resource waste caused by unreasonable spray in the existing method is solved.
Further, the acquiring of the outdoor environment temperature and the air conditioner operation parameters includes:
acquiring outdoor environment temperature through a temperature sensor or an outer machine mainboard, wherein a temperature measuring probe of the temperature sensor is at least a preset distance away from a heat exchanger and is far away from an air inlet and an air outlet of an outer machine;
the exhaust pressure of the compressor is obtained through a pressure sensor or an outer machine mainboard, and the pressure sensor is arranged between an exhaust port of the compressor and the heat exchanger.
In the implementation process, the outdoor environment temperature can be acquired through the temperature sensor or the outer machine mainboard, and the exhaust pressure of the compressor can be acquired through the pressure sensor or the outer machine mainboard, so that the accuracy and effectiveness of parameters are ensured.
Further, after the condition of starting spraying is met, determining a spraying mode comprises the following steps:
judging whether a spray starting condition is met or not based on the outdoor environment temperature and the compressor discharge pressure;
and if so, determining a spraying mode, wherein the spraying mode comprises an intermittent spraying mode and a continuous spraying mode.
In the implementation process, whether the spraying condition is met or not can be reasonably judged by utilizing the outdoor environment temperature and the compressor exhaust pressure, so that spraying is started, the spraying mode is further determined, and waste of water resources is avoided.
Further, the determining whether a start-up condition is satisfied based on the outdoor ambient temperature and the compressor discharge pressure includes:
if T0 is more than or equal to a0 and P0 is more than or equal to b0, the start-up condition is met;
where T0 represents the outdoor ambient temperature, P0 represents the compressor discharge pressure, a0 represents the first preset temperature threshold, and b0 represents the first preset pressure threshold.
In the implementation process, spraying is carried out when the spraying conditions are met, and if any one of the parameters T0 and P0 does not meet the spraying starting condition, spraying is not started, so that water resource waste caused by unreasonable spraying starting is avoided.
Further, if yes, determining a spraying mode, including:
if T0 is more than or equal to a1 and P0 is more than or equal to b1, executing a continuous spraying mode;
if T0< a1 or P0< b1, executing an intermittent spraying mode;
where a1 represents a second preset temperature threshold and b1 represents a second preset pressure threshold.
In the implementation process, judgment conditions of an intermittent spraying mode and a continuous spraying mode are given.
Further, if yes, determining a spraying mode, including:
and if the mode is an intermittent spraying mode, searching preset spraying time and spraying stopping time corresponding to the current outdoor environment temperature.
In the implementation process, the spraying duration and the spraying stopping duration data corresponding to different outdoor environment temperatures are pre-established, and the spraying duration and the spraying stopping duration corresponding to the intermittent spraying mode can be quickly determined by searching.
Further, the spraying time length and the spraying stopping time length are calculated by utilizing the outdoor environment temperature, the spraying flow and the size of the heat exchanger.
In the implementation process, the spraying time and the spraying stopping time corresponding to each outdoor environment temperature are calculated by using the outdoor environment temperature, the spraying flow and the size of the heat exchanger, so that the corresponding spraying time and the spraying stopping time are inquired according to the current environment temperature in the intermittent spraying mode.
Further, the calculating the spraying time length and the spraying stopping time length by utilizing the outdoor environment temperature, the spraying flow and the heat exchanger size comprises the following steps:
calculating the mass transfer coefficient based on the relationship between the convective heat transfer coefficient and the mass transfer coefficient of the surface of the heat exchanger:
wherein h ismDenotes the mass transfer coefficient, LefRepresenting the Lewis factor, h representing the convective heat transfer coefficient of the heat exchanger surface, cpRepresents the specific heat of the fluid;
the lewis factor is represented as:
wherein d isaMoisture content of humid air, dwThe saturated moisture content of the wet air at the water film temperature, and Le is the Liouyi number;
the convective heat transfer coefficient of the heat exchanger surface is expressed as:
wherein d is the exterior scene of the base pipe, y is the fin pitch, H is the fin height, w is the air flow velocity on the narrowest section, and v is the kinematic viscosity of air;
during an intermittent spray cycle, the total spray water consumption is expressed as:
m＝Q·tx；
if the spray liquid is completely evaporated during an intermittent spray cycle, it is expressed as:
m＝hm*A*(tx+ty)；
then:
ty＝ρ*Hf/hm；
where ρ is the density of the coolant, HfIn order to cover the thickness of the liquid film on the heat exchanger, Q is the spray flow, and A is the surface area of the heat exchanger.
In the implementation process, the spraying time and the spraying stopping time can be determined by parameters such as outdoor environment temperature, spraying flow and the like, so that the waste of water resources is avoided while the intermittent spraying mode can reasonably spray.
Further, in the spraying process, determining whether the spraying mode needs to be switched based on the outdoor environment temperature includes:
if the current mode is a continuous spraying mode and T0 is not more than a1, switching to an intermittent spraying mode;
if the current mode is in the intermittent spraying mode and T0 is more than or equal to a1, switching to the continuous spraying mode;
if the outdoor temperature is in an increasing state and T0< a1 when the outdoor temperature is in the intermittent spraying mode currently, the spraying time length is increased;
if the outdoor temperature is in a reduced state and T0> a0 when the outdoor temperature is in the intermittent spraying mode currently, reducing the spraying time length;
where T0 represents the outdoor ambient temperature, a0 represents the first preset temperature threshold, and a1 represents the second preset temperature threshold.
In the implementation process, the spraying mode can be reasonably changed according to the change of the outdoor environment temperature in the spraying process.
Further, the method further comprises:
and when the discharge pressure of the compressor is less than a third preset pressure threshold value or the outdoor environment temperature reaches the spray stopping temperature, stopping spraying.
In the implementation process, the condition of stopping spraying is given, so that the time for stopping spraying is reasonably determined.
Further, the air conditioner operation parameters include a heat exchanger refrigerant pipe temperature, and the method further includes:
and stopping spraying when the outdoor environment temperature reaches the spraying stopping temperature.
In the implementation process, the temperature of a refrigerant pipe of the heat exchanger can be used for replacing the exhaust pressure of the compressor to judge the parameters of the spraying conditions.
The embodiment of the present application further provides a spray control device, the device includes:
the parameter acquisition module is used for acquiring the outdoor environment temperature and the air conditioner operation parameters so as to determine that the spraying starting condition is met;
the mode selection module is used for determining a spraying mode after meeting a spraying starting condition;
the spraying module is used for spraying the heat exchanger based on the spraying mode;
and the switching module is used for judging whether the spraying mode needs to be switched or not based on the outdoor environment temperature in the spraying process.
In the implementation process, the spray starting condition is judged by utilizing the outdoor environment temperature and the air conditioner operation parameters, the temperature change inside and outside the heat exchanger is comprehensively considered, the spray starting condition is reasonably determined, and whether the spray mode needs to be switched or not is judged according to the outdoor environment temperature change in the spray process, so that the waste of water resources is effectively avoided, and the problem of water resource waste caused by unreasonable spray in the existing method is solved.
The embodiment of the application further provides electronic equipment, which comprises a memory and a processor, wherein the memory is used for storing a computer program, and the processor runs the computer program to enable the electronic equipment to execute the spraying control method.
The embodiment of the application also provides a readable storage medium, wherein computer program instructions are stored in the readable storage medium, and when the computer program instructions are read and executed by a processor, the spraying control method is executed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a flowchart of a spraying control method provided in an embodiment of the present application;
fig. 2 is a flow chart of spray control provided in the embodiment of the present application;
fig. 3 is a flowchart for acquiring an outdoor ambient temperature and an air conditioner operation parameter according to an embodiment of the present disclosure;
fig. 4 is a flow chart of determining a spray starting and spraying mode provided in the embodiment of the present application;
fig. 5 is a schematic diagram of a spraying mode provided in an embodiment of the present application;
fig. 6 is a block diagram of a spraying control device according to an embodiment of the present application.
Icon:
100-a parameter acquisition module; 200-a mode selection module; 300-a spray module; 400-switching module.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, fig. 1 is a flowchart of a spraying control method according to an embodiment of the present disclosure. The method specifically comprises the following steps:
step S100: acquiring outdoor environment temperature and air conditioner operation parameters to determine that the start-up condition is met;
step S200: determining a spraying mode after meeting a spraying starting condition;
step S300: spraying the heat exchanger based on the spraying mode;
step S400: and in the spraying process, judging whether the spraying mode needs to be switched or not based on the outdoor environment temperature.
In the prior art, a single control parameter is used as a control condition for starting spraying of a spraying system, and the single control parameter has certain one-sidedness, so that the spraying starting time is unreasonable, for example, spraying is carried out when spraying is not needed, and waste of water resources is caused.
In the method, the outdoor environment temperature and the air conditioner operation parameters are used as the spray starting judgment condition for judging whether the spray system is started, the temperature change inside and outside the heat exchanger is comprehensively considered, and the spray starting condition is reasonably determined, so that the spray system is started when necessary, and the waste of water resources is avoided.
In addition, the method can also judge whether the spraying mode needs to be switched according to the change of the outdoor environment temperature in the spraying process, namely, the switching between the continuous spraying mode and the intermittent spraying mode is realized under the condition that the working efficiency of the heat exchanger is influenced, so that the spraying system does not need to work in the continuous spraying mode all the time, the waste of water resources is effectively avoided, and the problem of water resource waste caused by unreasonable spraying in the existing method is solved.
When the air conditioner operates in a refrigeration mode, whether the start-up condition is met can be judged through the outdoor environment temperature and the air conditioner operation parameters.
As one embodiment, as shown in fig. 2, the air conditioner operation parameter may be a compressor discharge pressure for a spray control flowchart. Then, as shown in fig. 3, in order to obtain the outdoor ambient temperature and the air conditioner operation parameters, in step S100, the specific steps of parameter obtaining are as follows:
step S101: acquiring outdoor environment temperature through a temperature sensor or an outer machine mainboard, wherein a temperature measuring probe of the temperature sensor is at least a preset distance away from a heat exchanger and is far away from an air inlet and an air outlet of an outer machine;
the outdoor environment temperature T0 can be measured by a temperature sensor or obtained by communication from the outer machine mainboard:
when the temperature sensor is used for measuring the ambient temperature, the temperature measuring probe is arranged at a distance of at least a preset distance from the heat exchanger, for example, the preset distance is 10cm, the measuring result is prevented from being influenced by the temperature of the machine caused by the work of the heat exchanger, the temperature measuring probe is required to be arranged at an air inlet and an air outlet far away from an external machine, and spray liquid drops are prevented from falling onto the temperature sensor, so that the accuracy of ambient temperature measurement is ensured;
when the environment temperature parameter is obtained from the external machine mainboard in a communication mode, the circuit board is provided with a communication chip, and the parameter obtained from the external machine is stored in the chip.
Step S102: the exhaust pressure of the compressor is obtained through a pressure sensor or an outer machine mainboard, and the pressure sensor is arranged between an exhaust port of the compressor and the heat exchanger.
The discharge pressure of the compressor can be measured by a pressure sensor or obtained by communication from an external machine mainboard through a data line:
when the pressure sensor is used for measurement, the pressure sensor is arranged between the exhaust port of the compressor and the outlet of the outer machine heat exchanger; the pressure signal is transmitted to a circuit board in the detection module and transmitted to the control module.
When the exhaust pressure parameters are obtained from the outer machine mainboard in a communication mode, the circuit board is provided with a communication chip, and the parameters obtained from the outer machine are stored in the chip.
Judging the spray starting condition:
if T0 is more than or equal to a0 and P0 is more than or equal to b0, the start-up condition is met;
where T0 represents the outdoor ambient temperature, P0 represents the compressor discharge pressure, a0 represents the first preset temperature threshold, and b0 represents the first preset pressure threshold.
Wherein the value ranges of a0 and b0 are respectively that a0 is more than or equal to 27 ℃ and less than or equal to 35 ℃, and b0 is more than or equal to 2.3MPa and less than or equal to 2.9 MPa.
The value ranges of a0 and b0 can be specifically set according to the spraying requirements, and are not limited at all.
If any parameter of T0 and P0 does not satisfy the condition of starting to spout, then do not start to spray, only when two parameters of T0 and P0 all satisfy above-mentioned condition, just start to spray, the purpose of doing so is, utilize the inside and outside temperature distribution of a plurality of parameter all-round consideration heat exchanger, improve and spray the rationality of opening, only can open when necessary (satisfy above-mentioned two conditions of starting to spout simultaneously) and spray, effectively avoided the waste of water resource.
As shown in fig. 4, in order to determine the flow chart of the spray starting and spraying modes, step S200 specifically includes:
step S201: judging whether a spray starting condition is met or not based on the outdoor environment temperature and the compressor discharge pressure;
step S202: if so, determining a spraying mode, wherein the spraying mode comprises an intermittent spraying mode and a continuous spraying mode;
after the spraying starting condition is met, the spraying mode needs to be further judged to be a continuous spraying mode or an intermittent spraying mode.
If T0 is more than or equal to a1 and P0 is more than or equal to b1, executing a continuous spraying mode;
if T0< a1 or P0< b1, executing an intermittent spraying mode;
where a1 represents a second preset temperature threshold and b1 represents a second preset pressure threshold.
Illustratively, a1 has a value range of a1 ≥ 38 deg.C, and b1 has a value range of b1 ≥ 2.9 MPa.
As shown in fig. 5, it is a schematic diagram of a spraying mode, wherein S21 shows an intermittent spraying mode, i.e. a spraying duration tx is executed, and a spraying stopping time ty is executed, and periodic cyclic spraying is performed according to the spraying duration tx and the spraying stopping time ty; s23 shows a continuous spray mode. Wherein, a proportional relation exists between tx and ty, the relation is obtained by a thermodynamic calculation method, if the value range of tx is more than or equal to 2s and less than or equal to 6s, and the value range of ty is more than or equal to 0s and less than or equal to 30 s; when ty is 0s, the continuous spraying mode is obtained.
And if the mode is an intermittent spraying mode, searching preset spraying time and spraying stopping time corresponding to the current outdoor environment temperature.
For example, a parameter table may be preset, and the preset parameter table includes corresponding spraying duration and spraying stop duration at different outdoor ambient temperatures. In the intermittent spraying mode, the corresponding spraying time length and the spraying stopping time length under the current outdoor environment temperature can be directly obtained by searching the preset parameter table.
Before searching, the spraying duration and the spraying stopping duration corresponding to each outdoor environment temperature need to be calculated in advance.
For example, the spraying duration and the spraying stopping duration can be calculated according to parameters such as the outdoor environment temperature, the spraying flow and the heat exchanger size, and specifically:
firstly, assuming that the spray liquid completely covers the surface of the heat exchanger; ignoring the surface fluctuation of the liquid film, and considering the gas-liquid interface of the liquid film as a smooth surface; considering that the convective heat transfer coefficient of the air and the surface of the liquid film is equal to the convective heat transfer coefficient of the air and the wall surface of the finned tube; calculating the spraying time length and the spraying stopping time length on the premise of the assumption:
calculating the mass transfer coefficient by adopting a thermal mass comparison calculation method based on the relationship between the convective heat transfer coefficient and the mass transfer coefficient of the surface of the heat exchanger:
namely:
wherein h represents the convective heat transfer coefficient of the surface of the heat exchanger, W/(m)2K)，cpRepresents the specific heat of the fluid, J/(kgK);
therefore, only Le needs to be calculatedfAnd h is taken as the value of the sum to obtain the mass transfer coefficient hm。
Wherein for the Lewis factor LefThe calculation of (2):
cpthe value of (a) can be obtained by inquiring the ambient temperature T0; lefThe calculation can be made using the following formula:
the lewis factor is represented as:
wherein d isaThe moisture content of the wet air can be calculated by the dry bulb temperature T0 of the wet air and the relative humidity, and the relative humidity can be an average value of local climate parameters in the spraying operation time period; dwThe water film temperature is the saturated moisture content of the wet air at the water film temperature, and the water film temperature can be the temperature of tap water; le is the number of Liu Yi Si, an empirical parameter, and can be 0.865.
The calculation of the heat convection coefficient h, heat exchangers of different types and sizes have different heat convection coefficients h, and taking the finned tube heat exchanger in the row as an example, the heat convection coefficient of the heat exchanger surface is expressed as follows:
wherein d is the outer diameter of the base pipe; y is the fin pitch; h is the height of the fin, H is (a-d)/2, and a is the side length of the square fin; w is the air flow velocity on the narrowest section, m/s; v is the kinematic viscosity of air, m2S; λ is the thermal conductivity of air. The kinematic viscosity and the thermal conductivity of the air are related to the air temperature, and can be obtained by direct query of the Nitt Refprop; the air flow rate over the narrowest cross section is related to the heat exchanger structure and the fan damper and can be obtained experimentally.
During an intermittent spray cycle, the total spray water consumption is expressed as:
m＝Q·tx；
if the spray liquid is completely evaporated during an intermittent spray cycle, it is expressed as:
m＝hm*A*(tx+ty)；
then:
ty＝ρ*Hf/hm；
where ρ is the density of the coolant, HfFor the thickness of the liquid film covering the heat exchanger, Q is the spray flow, A is the surface area of the heat exchanger, hmDenotes the mass transfer coefficient, kg/(m)2s)。
Therefore, based on the ambient temperature T0, the spray flow rate Q, the coolant temperature, and the heat exchanger size, the corresponding intermittent spray times tx and ty can be obtained by the above equation.
When the control module supplies power to the electromagnetic valve, the electromagnetic valve is opened, and cooling liquid is sprayed out from the nozzle to an outer machine heat exchanger to realize spray cooling; when the control module is powered off to the electromagnetic valve, the electromagnetic valve is closed, and spraying is stopped.
In the spraying process, the spraying mode is not fixed but is changed correspondingly with the ambient temperature, and at the moment, the discharge pressure of the compressor is changed and is not used as the judgment condition for the change of the spraying mode.
The step S400 may specifically include:
if the current mode is a continuous spraying mode and T0 is not more than a1, switching to an intermittent spraying mode;
if the current mode is in the intermittent spraying mode and T0 is more than or equal to a1, switching to the continuous spraying mode;
if the outdoor temperature is in an increasing state and T0< a1 when the outdoor temperature is in the intermittent spraying mode currently, the spraying time length is increased;
if the outdoor temperature is in a reduced state and T0> a0 when the outdoor temperature is in the intermittent spraying mode currently, reducing the spraying time length;
where T0 represents the outdoor ambient temperature, a0 represents the first preset temperature threshold, and a1 represents the second preset temperature threshold.
Illustratively, if the spraying mode is currently in the continuous spraying mode, when the detection module detects that the ambient temperature T0 is not less than a1-1, the spraying mode is switched to the intermittent spraying mode, and the intermittent spraying mode is obtained by inquiring the currently detected ambient temperature in a preset parameter table;
if the spraying mode is currently in the intermittent spraying mode, when the detection module detects that the ambient temperature T0 is more than or equal to a1+1, the spraying mode is switched to the continuous spraying mode;
if the spraying mode is currently in the intermittent spraying mode, when the ambient temperature rises and the temperature after rising is less than a1+1, the overall spraying water quantity is improved by increasing the spraying time length or reducing the spraying stopping time length, such as the change process from S21 to S22 in FIG. 5; on the contrary, when the ambient temperature is reduced and the reduced ambient temperature is greater than a0, the overall spraying water amount is reduced by reducing the spraying time or increasing the spraying stopping time, such as the change process from S22 to S21 in fig. 5, so that the spraying flexibility is improved, and the waste of water resources can be effectively avoided on the premise of achieving the spraying and cooling effects.
The method further comprises the following steps:
and when the discharge pressure of the compressor is less than a third preset pressure threshold value or the outdoor environment temperature reaches the spray stopping temperature, stopping spraying.
Specifically, the method comprises the following steps: when detecting that the exhaust pressure of the compressor is smaller than a specified value or the outdoor environment temperature reaches the spray stopping temperature, the control module cuts off the power supply of the electromagnetic valve, the system stops spraying, and the judgment of the step S100 stage is carried out again:
in the spraying operation process, when the discharge pressure P0 of the compressor is not less than b2 or the outdoor environment temperature T0 is not less than a2, stopping spraying;
wherein b2 is less than or equal to 2.1MPa, a2 is less than or equal to 30 ℃.
For the spray stopping condition, the discharge pressure of the compressor or any parameter of the outdoor environment temperature can be adopted for judgment, and as long as one condition is met, the spraying can be stopped, namely when the image of the heat exchange effect of the spraying on the heat exchanger is small, the spraying can be stopped, and the waste of water resources is further avoided.
As another embodiment, the air conditioner operation parameter includes a heat exchanger refrigerant pipe temperature, and at this time, the heat exchanger refrigerant pipe temperature is used to replace the compressor discharge pressure in the above embodiment:
and stopping spraying when the outdoor environment temperature reaches the spraying stopping temperature.
Specifically, the air conditioner operation parameter may be an external unit heat exchanger temperature, which generally refers to a heat exchanger refrigerant pipe temperature and may be represented by T1, and at this time, the start-up condition is as follows:
if T1 is more than or equal to c0 and P0 is more than or equal to b0, the start-up condition is met;
at the moment, the value range of c0 can be that c0 is more than or equal to 38 ℃ and less than or equal to 48 ℃;
when the spray mode is switched and the spray is stopped correspondingly, the value ranges of the parameters c1 and c2 corresponding to b1 and b2 in the judgment condition are as follows:
c1≥48℃，c2≤35℃。
in addition, the specific judgment process of the spray starting condition and the spray mode is the same as that described above, and is not described herein again.
For the judgment of the stop of the spraying, the heat exchanger temperature sensor is influenced by the spraying liquid at the moment, and the stop of the spraying system cannot be judged by the aid of T1, so that the stop of the spraying system is controlled only by the outdoor environment temperature, namely the spraying is stopped when the temperature is T1 not more than a2, and the temperature is a2 not more than 30 ℃.
An embodiment of the present application further provides a spraying control device, which is applied to a spraying control method, as shown in fig. 6, and is a structural block diagram of the spraying control device, where the device may specifically include, but is not limited to:
the parameter acquisition module 100 is used for acquiring outdoor environment temperature and air conditioner operation parameters to determine that the spraying starting condition is met;
the mode selection module 200 is used for determining a spraying mode after meeting a spraying starting condition;
the spraying module 300 is used for spraying the heat exchanger based on the spraying mode;
the spraying module 300 realizes the starting and stopping of spraying by controlling the on-off of the electromagnetic valve arranged on the water pipe.
And a switching module 400, configured to determine whether a spraying mode needs to be switched based on the outdoor environment temperature in a spraying process.
The specific working process of each module has been specifically described in the method embodiment, and is not described herein again.
The spray starting condition is judged by utilizing the outdoor environment temperature and the air conditioner operation parameters, the temperature change inside and outside the heat exchanger is comprehensively considered, the spray starting condition is reasonably determined, and whether the spray mode needs to be switched is judged according to the outdoor environment temperature change in the spray process, so that the waste of water resources is effectively avoided, and the problem of water resource waste caused by unreasonable spray in the conventional method is solved.
The embodiment of the application further provides electronic equipment, which comprises a memory and a processor, wherein the memory is used for storing a computer program, and the processor runs the computer program to enable the electronic equipment to execute the spraying control method.
The embodiment of the application also provides a readable storage medium, wherein computer program instructions are stored in the readable storage medium, and when the computer program instructions are read and executed by a processor, the spraying control method is executed.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
Claims (14)
1. A spray control method, the method comprising:
acquiring outdoor environment temperature and air conditioner operation parameters to determine that the spray starting condition is met;
determining a spraying mode after meeting a spraying starting condition;
spraying the heat exchanger based on the spraying mode;
and in the spraying process, judging whether the spraying mode needs to be switched or not based on the outdoor environment temperature.
2. The spray control method of claim 1, wherein the obtaining of the outdoor ambient temperature and the air conditioner operating parameters comprises:
acquiring outdoor environment temperature through a temperature sensor or an outer machine mainboard, wherein a temperature measuring probe of the temperature sensor is at least a preset distance away from a heat exchanger and is far away from an air inlet and an air outlet of an outer machine;
the exhaust pressure of the compressor is obtained through a pressure sensor or an outer machine mainboard, and the pressure sensor is arranged on a pipeline between an exhaust port of the compressor and the heat exchanger.
3. The spray control method according to claim 2, wherein the determining the spray mode after the spray start condition is satisfied comprises:
judging whether a spray starting condition is met or not based on the outdoor environment temperature and the compressor discharge pressure;
and if so, determining a spraying mode, wherein the spraying mode comprises an intermittent spraying mode and a continuous spraying mode.
4. The spray control method of claim 3, wherein said determining whether a spray start condition is satisfied based on the outdoor ambient temperature and the compressor discharge pressure comprises:
if T0 is more than or equal to a0 and P0 is more than or equal to b0, the start-up condition is met;
where T0 represents the outdoor ambient temperature, P0 represents the compressor discharge pressure, a0 represents the first preset temperature threshold, and b0 represents the first preset pressure threshold.
5. The spray control method according to claim 2, wherein the determining the spray mode after the spray start condition is satisfied comprises:
if T0 is more than or equal to a1 and P0 is more than or equal to b1, executing a continuous spraying mode;
if T0< a1 or P0< b1, executing an intermittent spraying mode;
where a1 represents a second preset temperature threshold and b1 represents a second preset pressure threshold.
6. The spray control method of claim 3, wherein determining the spray pattern if satisfied comprises:
and if the mode is an intermittent spraying mode, searching preset spraying time and spraying stopping time corresponding to the current outdoor environment temperature.
7. The spray control method of claim 6, wherein prior to the step of finding the preset spray duration and spray off duration corresponding to the current outdoor ambient temperature, the method further comprises: and calculating the spraying time length and the spraying stopping time length by utilizing the outdoor environment temperature, the spraying flow and the size of the heat exchanger.
8. The spray control method of claim 7, wherein calculating the spray duration and the spray off duration using the outdoor ambient temperature, the spray flow rate, and the heat exchanger size comprises:
calculating the mass transfer coefficient based on the relationship between the convective heat transfer coefficient and the mass transfer coefficient of the surface of the heat exchanger:
wherein h ismDenotes the mass transfer coefficient, LefRepresenting the Lewis factor, h representing the convective heat transfer coefficient of the heat exchanger surface, cpRepresenting a specific heat of the fluid, obtained based on the current outdoor ambient temperature;
the lewis factor is represented as:
wherein, daMoisture content of humid air, dwThe saturated moisture content of the wet air at the water film temperature, and Le is the Liouyi number;
the convective heat transfer coefficient of the heat exchanger surface is expressed as:
wherein d is the outer diameter of the base pipe, y is the fin pitch, H is the fin height, w is the air flow velocity on the narrowest section, and v is the kinematic viscosity of air;
during an intermittent spray cycle, the total spray water consumption is expressed as:
m＝Q·tx；
if the spray liquid is completely evaporated during an intermittent spray cycle, it is expressed as:
m＝hm*A*(tx+ty)；
then:
ty＝ρ*Hf/hm；
where ρ is the density of the coolant, HfIn order to cover the thickness of the liquid film on the heat exchanger, Q is the spray flow, and A is the surface area of the heat exchanger.
9. The spray control method according to claim 2, wherein the determining whether the spray mode needs to be switched based on the outdoor environment temperature during the spraying process comprises:
if the spraying device is currently in the continuous spraying mode and T0< a1, switching to the intermittent spraying mode;
if the current mode is in the intermittent spraying mode and T0 is more than or equal to a1, switching to the continuous spraying mode;
if the outdoor environment temperature is in an increasing state and T0< a1 when the outdoor environment temperature is in the intermittent spraying mode currently, the spraying time length is increased;
if the outdoor environment temperature is in a reduced state and T0> a0 when the outdoor environment temperature is in the intermittent spraying mode currently, the spraying time length is reduced;
where T0 represents the outdoor ambient temperature, a0 represents the first preset temperature threshold, and a1 represents the second preset temperature threshold.
10. The spray control method of claim 2, further comprising:
and when the exhaust pressure of the compressor is less than a third preset pressure threshold value or the outdoor environment temperature reaches the spray stopping temperature, stopping spraying.
11. The spray control method of claim 1, wherein the air conditioning operating parameter comprises a heat exchanger refrigerant tube temperature, the method further comprising:
and stopping spraying when the outdoor environment temperature reaches the spraying stopping temperature.
12. A spray control device, said device comprising:
the parameter acquisition module is used for acquiring the outdoor environment temperature and the air conditioner operation parameters so as to determine that the spraying starting condition is met;
the mode selection module is used for determining a spraying mode after meeting a spraying starting condition;
the spraying module is used for spraying the heat exchanger based on the spraying mode;
and the switching module is used for judging whether the spraying mode needs to be switched or not based on the outdoor environment temperature in the spraying process.
13. An electronic device, comprising a memory for storing a computer program and a processor for executing the computer program to cause the electronic device to perform the spray control method according to any one of claims 1 to 11.
14. A readable storage medium having stored therein computer program instructions which, when read and executed by a processor, perform the spray control method of any one of claims 1 to 11.
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| CN114165851A (en) * | 2021-11-30 | 2022-03-11 | 青岛海信日立空调系统有限公司 | Air conditioning unit |
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| CN112628967A (en) * | 2020-12-22 | 2021-04-09 | 维克（天津）有限公司 | Spraying device for variable frequency air conditioning system and control method thereof |
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| CN111578470A (en) * | 2020-05-13 | 2020-08-25 | 青岛海尔空调器有限总公司 | Spraying control method of air conditioning system |
| WO2021249461A1 (en) * | 2020-06-10 | 2021-12-16 | 中兴通讯股份有限公司 | Method and apparatus for controlling refrigeration device, computer device, and computer readable medium |
| CN112628967A (en) * | 2020-12-22 | 2021-04-09 | 维克（天津）有限公司 | Spraying device for variable frequency air conditioning system and control method thereof |
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| CN114165851B (en) * | 2021-11-30 | 2023-04-11 | 青岛海信日立空调系统有限公司 | Air conditioning unit |
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